|Gettysburg - Baker, John R|
Keywords: Gettysburg, Battle of, Gettysburg, Pa., 1863
|Biology In Everyday Life - Baker,John R.|
Keywords: NATURAL SCIENCES; Biological sciences in general; General and theoretical biology
|Flexible Models for Solar Sail Control - Weaver Smith, Suzanne|
Solar sails employ a unique form of propulsion, gaining momentum from incident and reflected photons. However, the momentum transferred by an individual photon is extremely small. Consequently, a solar sail must have an extremely large surface area and also be extremely light. The flexibility of the sail then must be considered when designing or evaluating control laws. In this paper, solar sail flexibility and its influence on control effectiveness is considered using idealized two-dimensional ...
Keywords: MARS MISSIONS; SHORT CIRCUITS; SPACE SUITS; LASER DOPPLER VELOCIMETERS; SCIENCE; RESEARCH AND DEVELOPMENT; ELECTROSTATIC CHARGE; SEDIMENTARY ROCKS; INTERPLANETARY DUST; ANALYZERS; NASA SPACE PROGRAMS; EDUCATION